OBD Code P0017: Crankshaft Camshaft Correlation Bank 1 Sensor B

Quick Answer: Code P0017 indicates your engine’s crankshaft and camshaft are out of sync on Bank 1 (the side with cylinder #1). This is usually caused by a stretched timing chain, faulty camshaft sensor, or a stuck variable valve timing (VVT) system. The most common fix involves replacing the timing chain or camshaft position sensor.

When your vehicle’s onboard diagnostic system triggers code P0017, it means the engine control module (ECM) has detected a timing correlation problem between the crankshaft and the exhaust camshaft on Bank 1 of your engine. In simpler terms, your engine’s internal timing is out of sync, which can cause rough running, reduced power, and potential engine damage if left unaddressed. This code is more serious than some others and should be diagnosed and repaired promptly.

What Does P0017 Mean?

P0017 is a diagnostic trouble code that stands for “Crankshaft Position Camshaft Position Correlation Bank 1 Sensor B.” Let’s break this down:

Crankshaft Position: The crankshaft is the main rotating shaft in your engine that converts the up-and-down motion of the pistons into rotational motion.
Camshaft Position: The camshaft controls the opening and closing of your engine’s intake and exhaust valves at precisely the right moments.
Correlation: This means the timing relationship between these two components. They must work in perfect synchronization for the engine to run properly.
Bank 1: This refers to the side of the engine that contains cylinder #1.
Sensor B: This specifically refers to the exhaust camshaft position sensor on Bank 1.

When the ECM detects that the crankshaft and exhaust camshaft are not properly synchronized, it sets this code and illuminates the check engine light. The engine’s timing must be precise—typically within a few degrees—for optimal performance and emissions control.

Common Symptoms

If your vehicle has triggered code P0017, you may notice one or more of the following symptoms:

Check Engine Light: The most obvious indicator that a diagnostic code has been set.
Rough Idle: Your engine may shake or vibrate noticeably when stopped at a red light or in park.
Reduced Engine Power: You may feel a noticeable loss of acceleration and overall engine performance.
Rattling Noise: A metallic rattling sound from the front of the engine, especially during cold starts, may indicate a stretched timing chain.
Decreased Fuel Economy: Your vehicle may consume more fuel than usual as the engine works harder to compensate for timing issues.
Difficulty Starting: The engine may be harder to start or may crank longer than normal.
Stalling: In some cases, the engine may stall while driving or at idle.

Possible Causes (Ranked by Frequency)

Code P0017 can be caused by several issues, listed here from most to least common:

1. Stretched or Worn Timing Chain

The timing chain connects the crankshaft to the camshaft and must maintain precise synchronization. Over time, timing chains can stretch, causing the camshaft to fall out of sync with the crankshaft. This is one of the most common causes of P0017 and is especially prevalent in higher-mileage vehicles.

2. Faulty Exhaust Camshaft Position Sensor (Bank 1 Sensor B)

A malfunctioning camshaft position sensor may send incorrect signals to the ECM, causing it to believe the timing is off when it may actually be correct. Sensor failures are common due to exposure to heat and engine vibration.

3. Timing Chain Tensioner Failure

The timing chain tensioner keeps the chain tight and maintains proper tension. If the tensioner fails, the chain can become loose, allowing the camshaft to drift out of sync with the crankshaft.

4. Exhaust Camshaft Timing Off

If the exhaust camshaft has slipped on its sprocket or the timing has been incorrectly set during a previous repair, the correlation with the crankshaft will be lost.

5. Variable Valve Timing (VVT) System Malfunction

Many modern engines use a variable valve timing system to optimize performance. If the VVT solenoid is stuck or the VVT system is malfunctioning, it can cause timing correlation issues.

6. Engine Oil Issues

Low oil level, dirty oil, or incorrect oil viscosity can affect the operation of the timing chain tensioner and VVT system, both of which rely on proper oil pressure.

7. Timing Chain Guide Wear

The guides that keep the timing chain aligned can wear out, allowing the chain to move excessively and lose synchronization.

Diagnostic Steps

If you suspect your vehicle has code P0017, follow these diagnostic steps:

Step 1: Read the Code and Check for Additional Codes

Use an OBD-II scanner to confirm code P0017 and check for any related codes such as P0016, P0014, P0015, or P0018. These codes often appear together and can help pinpoint the exact cause.

Step 2: Check Engine Oil Level and Condition

Low or dirty oil can cause timing issues. Check your oil level and condition. If the oil is dark or hasn’t been changed recently, perform an oil and filter change.

Step 3: Inspect the Camshaft Position Sensor

Visually inspect the exhaust camshaft position sensor (Sensor B on Bank 1) for damage, corrosion, or loose connections. Clean any corrosion and ensure the connector is secure. A faulty sensor often triggers this code and is relatively inexpensive to replace.

Step 4: Check Timing Chain Condition

If you have mechanical experience, you can remove the timing chain cover to visually inspect the timing chain for excessive slack or wear. A stretched chain will be noticeably loose. This typically requires removing several components and is best left to a professional mechanic.

Step 5: Verify VVT System Operation

Check that the VVT solenoid is functioning correctly. The solenoid controls oil flow to the VVT actuator. A stuck solenoid or low oil pressure can cause timing correlation issues.

Step 6: Perform a Timing Check

A professional mechanic can use specialized diagnostic equipment to verify the actual timing correlation between the crankshaft and camshaft. This will confirm whether the issue is a sensor problem or an actual mechanical timing problem.

Step 7: Professional Diagnosis

If you’re unable to identify the cause after these steps, take your vehicle to a qualified mechanic or dealership. They have the specialized tools and expertise to diagnose timing issues accurately.

Repair Cost Estimates

The cost to repair code P0017 varies widely depending on the underlying cause:

Camshaft Position Sensor Replacement: $150–$400 (parts and labor). This is the least expensive repair option.
VVT Solenoid Replacement: $200–$500 (parts and labor).
Timing Chain Replacement: $800–$2,500+ (parts and labor). This is a major repair requiring significant engine disassembly.
Timing Chain Tensioner Replacement: $400–$1,200 (parts and labor).
Complete Timing System Overhaul: $1,500–$3,500+ if multiple components need replacement.

Costs vary significantly based on your vehicle’s make, model, year, and whether you visit an independent mechanic or dealership. Dealerships typically charge 20–40% more than independent shops.

Can I Still Drive?

Severity: Moderate to High

While you may be able to drive a vehicle with code P0017 for a short distance, it’s not recommended for extended driving. Here’s why:

Engine Damage Risk: If the timing is significantly off, continued driving can cause internal engine damage, including bent valves or damaged pistons.
Performance Loss: Your vehicle will likely experience reduced power, rough idle, and poor fuel economy.
Emissions: The vehicle will likely fail an emissions test.
Safety: Depending on the severity, the engine may stall unexpectedly, creating a safety hazard.

Recommendation: Have the code diagnosed and repaired as soon as possible. If the cause is a faulty sensor, you can likely drive carefully to a repair shop. If the cause is a stretched timing chain or other mechanical issue, avoid driving the vehicle and have it towed to a mechanic.

Frequently Asked Questions

Q: What’s the difference between P0016 and P0017?

A: P0016 is a general crankshaft/camshaft correlation code for Bank 1, while P0017 specifically refers to the exhaust camshaft (Sensor B) on Bank 1. P0016 may indicate either intake or exhaust timing issues, whereas P0017 pinpoints the exhaust side. If you have both codes, it suggests a more serious timing problem affecting both camshafts.

Q: Can a bad battery cause code P0017?

A: Indirectly, yes. A weak or dying battery can cause low voltage to the camshaft position sensor, resulting in incorrect sensor readings and triggering code P0017. However, if the code persists after a battery replacement or charge, the underlying cause is likely mechanical or sensor-related, not the battery.

Q: Will clearing the code fix the problem?

A: No. Clearing the code with an OBD-II scanner will temporarily turn off the check engine light, but the underlying problem remains. The code will return within a few driving cycles if the root cause isn’t repaired. Always diagnose and fix the cause rather than simply clearing the code.

Q: Is code P0017 covered under warranty?

A: If your vehicle is still under the manufacturer’s powertrain warranty (typically 5 years/60,000 miles), timing chain and sensor issues are usually covered. Check your warranty documentation or contact your dealership. If you’re out of warranty, you’ll be responsible for repair costs.

Summary: Code P0017 indicates a timing correlation problem between your crankshaft and exhaust camshaft on Bank 1. While the cause could be as simple as a faulty sensor (relatively inexpensive to fix), it could also indicate a stretched timing chain or failed tensioner (expensive repairs). Have the code diagnosed promptly by a qualified mechanic to prevent potential engine damage and restore your vehicle’s performance.

OBD Code P0017: Crankshaft Camshaft Correlation – Causes & Fixes